PlayStation Plus got off to a slow start in Japan. Sure, you get a library of PsOne games, but unlike PlayStation Plus in the West the service was light on recent games. Japan is starting to get unique titles like Miku Miku Hockey.
On September 19, the same day Tokyo Game Show starts, PlayStation Plus members in Japan will be able to download the TGS demo for rain. Since the first two days are for business, PlayStation Plus members actually get to play the demo before the general public can try it. The rain demo contains the first chapter of the game and will be available until September 25.